Pressure spray construction



Sept 10, 1957 D. M. HARVEY 2,805,890

PRESSURE SPRAY CONSTRUCTION Filed Jan. 27, 1951 ZSheets-Sheet 1 FIG.\

I 19% M 54 7 BY 7 ATTORNEY p 1957 o. M. HARVEY 2,805,890

PRESSURE SPRAY CONSTRUCTION I 2 Sheets-Sheet 2 36 29 Filed Jan. 27, 1951 IN V EN TOR.

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ATTORNEY Unitedstates Patent PRESSURE SPRAY CONSTRUCTION Draper M. Harvey, Hingham, Mass, assignor to'Automotive. &.Marine Products Corporatioma corporation of Massachusetts I Application January 27, 1951, Serial No. 208,196 r 7 Claims. (Cl. 29986) The present invention relates to theconstruction of spraying devices, and has particular referenceto a novel arrangement for spraying a vaporized fluid. 1

The principal object of the invention'is to provide a construction for spraying a vaporized fluid under pressure.

Another object of the invention is to provide a pres sure sprayer for supplying fluid in vaporized form to the working parts of an automotive engine.

A further object of the invention is to provide a novel pressure sprayer for vaporizing and spraying fluids such as chemicals, lacquers, paints, and the like.

An, additional object of the invention is to provide a novel pressure sprayer which includes a fluid vaporizer, a conduit of .any desired length, and a spray nozzle at the end of the conduit, which may be manually controlled, for ejecting a finely comminuted atomized vapor spray.

With the above and other objects and advantageous features in view, the invention consists of a novel arrangement of' parts morefully disclosedin the detailed description following; in conjunction with the accompanying drawings,'-and'morespecifically'defined in the claims appended thereto.

In the drawings,

Fig. l is a perspective view of an illustrative fluid container having a pressure sprayer head;

Fig. 2 is a perspective view of an illustrative bracket plate for mounting on the inlet manifold of an internal combustion engine;

Fig. 3 is a sectional detail through part of the sprayer head;

Fig. 4 is a horizontal sectional view through the fluid and air inlets and the mixture chamber of the sprayer head;

Fig. 5 is a detail section on the line 5-5 of Fig. 4;

Fig. 6 is a detail section on the line 66 of Fig. 4;

Fig. 7 is a side view, partly in section, of one embodiment of a spray nozzle and control valve;

Fig. 8 is an enlarged section through the spray nozzle of Fig. 7;

Fig. 9 is an end view of Fig. 8; and

Fig. 10 is a view, partly in section, of a modified spray nozzle with supplemental air supply.

It has been found desirable to provide an arrangement for spraying fluids under pressure, the fluid being thoroughly vaporized and then conducted through a conduit of any desired length to a spray nozzle, from which it emerges as a finely dispersed vapor spray. To this end, I provide a container for fluid which has a mixing chamber associated therewith for receiving fluid, such as top cylinder oil, chemicals, paint, varnish, or other liquid, from the container under pressure, and for adding air thereto, the mixture being whirled to provide a dispersion of the liquid in the air. The resulting vapor mixture is conveyed to a spray nozzle, and the flow may be valve controlled if desired.

Referring to the drawings, the container 10 may be of any desired shape and size, the illustrated embodiment being of rectangular box type, with nail brackets 11.

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The top 12 0f the container has an annular'upstanding. flange '13 on which a cupped head 14 is mounted and" secured, as by bolts 15 and an internal holding plate16'.

The head '14'has a filler opening 17 closed by a threaded closure cap 18, for filling the tank with fluid to be vaporized, and has aninlet Y 19 having one leg 20 with a conical air inlet passage 21' and a second leg 22 conical fluid inlet passage 23'which lead to a common flow passage 24, see Fig. 4. The leg 20 is threaded to receive a pressure air nipple 25 connected to a pressure'air supply conduit 26, and the air inlet passage 21 has an opening 27 in its lower wall communicating with the container interior as shown in Fig. 6,'whereby pressure"'is'continu ally exerted on the'fluid'in the container.

operate'with the conical fluid inlet passage 23 and to control flow of fluid therefrom. Fluid under pressure is 1 supplied'to the fluid inlet passage'23 through an apertured boss 32in which a supply tube 33 is threaded, the supply tube 33 depending downwards into the container, see Fig. 3, and having a flared or funnel shaped free end 34 which may be equipped with a screenif desired.

The outer end of the valve stem 30'has'a screw type head 35, and a coil spring 36 is mounted on the valve stem and presses against the head and the-seat 29 to hold the valve" stem in adjustedrelati'on for controlling the fluid flow 'to'the inlet passage 23, a c'ap37being threaded on the outer end of the leg 22 to prevent'inadvrtent" movement :of the valve stem.

The inflowing air and the"inflowing fluid entering the common flowpassage 24- eme'rge into 'a mixing chamber 38, "see Fig. :4, through an apertured washer 39f- 'and thoroughly The mixing chamber 38 is in the base 40 of the Y, and is formed by a shaped plug element 41 which has an outflow passage 42. A whirl housing 43 has its forward end seated in the Y base 40 against the plug element 41, and has a passage 44 communicating with the passage 42, preferably through an enlarged conical inlet 45, the passage44 leading to a chamber 46 in which a whirl 47 is set, to impart a rotary whirl at high speed to the mixture. The whirling mixture, which is thoroughly vaporized, exits through a nipple 48 which has a flow passage 49, and into a conduit 50, see Fig. 1, which may be of metal or of flexible material tubing.

When the pressure sprayer is to be used for painting, lacquering, or other spraying under pressure, it is preferred to connect the conduit 59 to a hand controlled nozzle device 51 such as shown in Fig. 7, the mixture entering a valve housing 52 through a passage 53, and through a compartment 54 in which a spring pressed plunger valve 55 is mounted for manual control, into a passage 56 and through a tube 57 to a nozzle tip 58. As illustrated in Fig. 8, the tip 58 has a rear section 59 with an inflow passage 60, the rear sect-ion end 61 being connected to the tube end by a lock cap 62 and a lock washer 63, and a front section 64 which is threaded to the rear section and houses a whirl 65, preferably with double helical threads, and a tapered nozzle 66, the nozzle end 67 of the front section being reduced in diameter and having its outer wall spirally grooved as shown at 68 in Fig. 9, whereby any liquid drops are whirled outwardly and dispersed without collecting and without deposits.

The nozzle end 67 may be threaded to receive an air inlet shell 69 having air inlet openings 70 leading to a flaring outflow passage 71, a perforated rotatable shell 72 being mounted on the rear of the shell 69 for adjusting air flow through the contiguous air inlet openings 70.

When the pressure sprayer is to be used for injecting Patented Se t. 10; 1957 5 top cylinder oil or chemicals into the intake manifold of an internal combustion engine, the conduit 50 is attached to a bracket plate 73, see Fig. 2, through a nipple 74 and a housing 75 in which a Whirl such as illustrated in Fig. 8 is mounted, the housing and bracket plate having a nozzle of the type shown in Fig. 8, and the bracket plate preferably having the area 76 adjacent the nozzle opening 77 in the fuel charge opening 78 spirally grooved.

Although I have described specific embodiments of the invention, it is obvious that the size, shape and arrangement of the parts may be changed to meet requirements for diflerent spray devices, Without departing from the spirit and the scope of the invention as defined in the appended claims.

I claim:

1. In a pressure sprayer, a container for fluid, a mixer head on said container having a mixing chamber, an inflow, passage communicating with the mixing chamber, a pressure air channel communicating With the inflow passage, 'a passage from the pressure air channel to the container for placing the container fluid under pressure, a fluid channel communicating the container with the inflow passage, an adjustable valve controlling flow of fluid through the fluid channel, a mixture outlet passage from the mixing chamber, a mixture flow conduit communicating with the outlet passage, and spray nozzle mechanism receiving mixture from the conduit, said mechanism having a mixture whirl device for thoroughly dispersing the fluid in the pressure air.

2. In the combination of claim 1, said mixture outlet passage havingmeans for vaporizing the fluid in the mixture.

3. In .the combination of claim 1, said mixture outlet passage having a Whirl device for vaporizing the fluid in the mixture.

4. In a pressure sprayer, a container for fluid, a mixer head on said container having a mixing chamber, an inflow passage communicating with the mixing chamber, a pressure air channel communicating with the inflow passage, apassage from the pressure air channel to the container for placing the container fluid under pressure, a fluid channel communicating the container With the inflow passage, an adjustable valve controlling flow of fluid through the fluid channel, a mixture outlet passage from the mixing chamber, a mixture flow conduit communicating with the outlet passage, and spray nozzle mechanism receiving mixture from the conduit, said mechanism having a mixture Whirl device with double helical flow grooves for thoroughly dispersing the fluid in the pressure air.

5. In the combination of claim 4, said mixture outlet passage having means for vaporizing the fluid in the mixture.

6. In the combination of claim 4, said mixture outlet passage having a Whirl device for vaporizing the fluid in the mixture.

7. A spray nozzle mechanism for a pressure sprayer, having a central chamber, a whirl device in said chamber, and an injector nozzle for receiving fluid from the whirl device, said injector nozzle having a terminal portion with an outflow orifice, said terminal portion having an external spiral groove in generally concentric relation to the orifice.

References Cited in the file of this patent UNETED STATES PATENTS 

